Description
Reversible heat‑induced gelation of polysaccharide hydrocolloids.
Technical
Agar forms a rigid, heat‑stable network through extensive hydrogen bonding between agarose chains, while carrageenan forms a flexible, ion‑dependent network via helical aggregation of sulfated galactan chains in the presence of K⁺ or Ca²⁺ ions. The gelation is thermoreversible, melting at higher temperatures and setting upon cooling.
Science
Primary Reaction
Thermoreversible polymer network formation via hydrogen bonding (agar) and ion‑mediated helix formation (carrageenan).
Sensory Profile
Aroma ()
neutralslightly sweetmarinecleanmineral
Origin & History
Civilization
Indigenous peoples of Southeast Asia (agar) and Irish seaweed harvesters (carrageenan)
Era